allowed for specifying not-yet-existent config file

bin/goldilocks.js

@@ -87,7 +87,17 @@ function checkConfigLocation(cwd, configFile) {
   var prom;
   if (configFile) {
     filename = path.resolve(cwd, configFile);
-    prom = fs.readFileAsync(filename);
+    prom = fs.readFileAsync(filename)
+      .catch(function (err) {
+        if (err.code !== 'ENOENT') {
+          return PromiseA.reject(err);
+        }
+        if (path.extname(filename) === '.json') {
+          return '{}';
+        }
+        return '';
+      })
+      ;
   } else {
     prom = PromiseA.reject('blah')
       .catch(function () {